Now showing items 1410-1429 of 2172

    • On a general mixed priority queue with server discretion 

      Fajardo, Val Andrei; Drekic, Steve (Taylor & Francis, 2016-10-01)
      We consider a single-server queueing system which attends to N priority classes that are classified into two distinct types: (i) urgent: classes which have preemptive resume priority over at least one lower priority class, ...
    • On Achieving High Survivability in Virtualized Data Centers 

      Rabbani, Md Golam; Zhani, Mohamed Faten; Boutaba, Raouf (Institute of Electronics, Information and Communication Engineers, 2014-01-01)
      As businesses are increasingly relying on the cloud to host their services, cloud providers are striving to offer guaranteed and highly-available resources. To achieve this goal, recent proposals have advocated to offer ...
    • On Aharoni’s rainbow generalization of the Caccetta–Häggkvist conjecture 

      Hompe, Patrick; Pelikánová, Petra; Pokorná, Aneta; Spirkl, Sophie (Elsevier, 2021-05-01)
      For a digraph G and v is an element of V(G), let delta(+)(v) be the number of out-neighbors of v in G. The Caccetta-Haggkvist conjecture states that for all k >= 1, if G is a digraph with n = |V(G)| such that delta(+)(v) ...
    • On estimands arising from misspecified semiparametric rate-based analysis of recurrent episodic conditions 

      Lee, Jooyoung; Cook, Richard J. (Wiley, 2019-11-10)
      Marginal rate-based analyses are widely used for the analysis of recurrent events in clinical trials. In many areas of application, the events are not instantaneous but rather signal the onset of a symptomatic episode ...
    • On Eulerian orientations of even-degree hypercubes 

      Levit, Maxwell; Chandran, L. Sunil; Cheriyan, Joseph (Elsevier, 2018-09-01)
      It is well known that every Eulerian orientation of an Eulerian 2k-edge connected (undirected) graph is strongly k-edge connected. A long-standing goal in the area is to obtain analogous results for other types of connectivity, ...
    • On fixed points of self maps of the free ball 

      Shamovich, Eli (Elsevier, 2018-07-01)
      In this paper, we study the structure of the fixed point sets of noncommutative self maps of the free ball. We show that for such a map that fixes the origin the fixed point set on every level is the intersection of the ...
    • On nonequilibrium shrinkage of supercritical CO2 droplets in a water-carrier microflow 

      Qin, Ning; Wen, John Z.; Chen, Baixin; Ren, Carolyn L. (AIP Publishing, 2018-07-16)
      We report an experimental study on the hydrodynamic shrinkage of supercritical carbon dioxide (scCO(2)) microdroplets during a nonequilibrium process. After scCO(2 )microdroplets are generated by water shearing upon a ...
    • On selfadjoint extensions of semigroups of partial isometries 

      Bernik, Janez; Marcoux, Laurent W.; Popov, Alexey I.; Radjavi, Heydar (American Mathematical Society, 2016)
      Let S be a semigroup of partial isometries acting on a complex, infinite- dimensional, separable Hilbert space. In this paper we seek criteria which will guarantee that the selfadjoint semigroup T generated by S consists ...
    • On Specht's Theorem in UHF C⁎-algebras 

      Marcoux, Laurent W.; Zhang, Yuanhang (Elsevier, 2021-01-01)
      Specht's Theorem states that two matrices A and B in Mn(C) are unitarily equivalent if and only if tr(w(A;A )) = tr(w(B;B )) for all words w(x; y) in two non-commuting variables x and y. In this article we examine to what ...
    • On symmetric intersecting families of vectors 

      Eberhard, Sean; Kahn, Jeff; Narayanan, Bhargav; Spirkl, Sophie (Cambridge University Press, 2021-11)
      A family of vectors in [k]n is said to be intersecting if any two of its elements agree on at least one coordinate. We prove, for fixed k ≥ 3, that the size of any intersecting subfamily of [k]n invariant under a transitive ...
    • On The Complexity Of The Evaluation Of Transient Extensions Of Boolean Functions 

      Brzozowski, Janusz; Li, Baiyu; Ye, Yuli (World Scientific Publishing, 2012-01-01)
      Transient algebra is a multi-valued algebra for hazard detection in gate circuits. Sequences of alternating 0's and 1's, called transients, represent signal values, and gates are modeled by extensions of boolean functions ...
    • On the measurement of relative powder-bed compaction density in powder-bed additive manufacturing processes 

      Ali, Usman; Mahmoodkhani, Yahya; Imani Shahabad, Shahriar; Esmaeilizadeh, Reza; Liravi, Farzad; Sheydaeian, Esmat; Huang, Ke Yin; Marzbanrad, Ehsan; Vlasea, Mihaela; Toyserkani, Ehsan (Elsevier, 2018-10-05)
      Experimental studies in the literature have identified the powder-bed compaction density as an important parameter, governing the quality of additively manufactured parts. For example, in laser powder-bed fusion (LPBF), ...
    • On the Number of Trials Needed to Obtain k Consecutive Successes 

      Drekic, Steve; Spivey, Michael Z. (Elsevier, 2021-04-30)
      A sequence of independent Bernoulli trials, each of which is a success with probability p, is conducted. For k ∈ Z+, let Xk be the number of trials required to obtain k consecutive successes. Using techniques from elementary ...
    • On the optimal CFL number of SSP methods for hyperbolic problems 

      Giuliani, Andrew; Krivodonova, Lilia (Elsevier, 2019-01-01)
      We show that the theory for strong stability preserving (SSP) time stepping methods employed with the method of lines-type discretizations of hyperbolic conservation laws may result in overly stringent time step restrictions. ...
    • On the Road to Making Science of “Art”: Risk Bias in Market Scoring Rules 

      Karimi, Majid; Dimitrov, Stanko (The Institute for Operations Research and the Management Sciences, 2018-06)
      We study market scoring rule (MSR) prediction markets in the presence of risk-averse or risk-seeking agents that have unknown yet bounded risk preferences. It is well known that if agents can be prescreened, then MSRs can ...
    • On the role of the microporous layer in PEMFC operation 

      Gostick, Jeffrey Thomas; Ioannidis, Marios A.; Fowler, Michael W.; Pritzker, Mark D. (Elsevier, 2009-03-01)
      The condition of liquid water breakthrough at the cathode of polymer electrolyte fuel cells (PEMFC) is studied experimentally and data on corresponding water saturation and capillary pressure are provided for gas diffusion ...
    • On the sensitivity of modelled groundwater recharge estimates to rain gauge network scale 

      Wiebe, Andrew J.; Rudolph, David L. (Elsevier, 2020-06-01)
      Rainfall is often the largest component of the water budget and even a small uncertainty percentage may lead to challenges for accurately estimating groundwater recharge as a calculated residual within a water budget ...
    • On the TVD property of second order methods for 2D scalar conservation laws 

      Krivodonova, Lilia; Smirnov, Alexey (arXiv, 2021-10-05)
      The total variation diminishing (TVD) property is an important tool for ensuring nonlinear stability and convergence of numerical solutions of one-dimensional scalar conservation laws. However, it proved to be challenging ...
    • On the use of physical boundary conditions for two-phase flow simulations: Integration of control feedback 

      Agnaou, Mehrez; Treeratanaphitak, Tanyakarn; Mowla, Amir; Ioannidis, Marios; Mohieddin Abukhdeir, Nasser; Budman, Hector (Elsevier, 2018-10-04)
      The sensitivity of two-phase flow simulations using the Euler–Euler model on the inlet boundary conditions (BCs) is studied. Specifically, the physical relevance of Dirichlet uniform inlet velocity BCs is studied which are ...
    • On-chip cell lysis by antibacterial non-leaching reusable quaternary ammonium monolithic column 

      Aly Saad Aly, Mohamed; Gauthier, Mario; Yeow, John (Springer US: Biomedical Microdevices, 2015-12-16)
      Reusable antibacterial non-leaching monolithic columns polymerized in microfluidic channels designed for on-chip cell lysis applications were obtained by the photoinitiated free radical copolymerization of diallyldimethylammonium ...

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